HER-possessive

https://www.lifeprint.com/asl101/gifs/h/his-hers.gif

IX-[her] object personal pronoun
In ASL-specific terminology, the index-finger version of this sign is most accurately called a third-person indexical pronoun or third-person index sign: IX-3a (the first location reference) (or less specifically, IX-3)

https://www.lifeprint.com/asl101/gifs/h/he-she-1.gif